Capability of Ground Penetrating Radar to Identify the Moisture Damage in Different Layers of Asphalt Mixture

Stripping is one of the asphalt surface distresses that is caused by moisture or by moisture have been intensifying. Stripping cause other distresses damage such a structural cracking and fatigue. Most common methods is coring and destructive test. The ratio of indirect tensile stress saturated to dry is one of them. But these tests are destructive and it takes time and money .In addition that test is suitable for points you core in asphalt surface and we can’t evaluate this method for widespread paving. Nowadays Ground penetration radar it helps pavement engineering to evaluate continuous and non-destructive test. In this research we have compared dried and conditioned of Bulk Specific Gravity test with TSR .we found Related between ITS and Bulk Specific Gravity with diagrams then, we compare the result of GPR surveys dielectric with destructive test .It has significantly related between The ratio of indirect tensile stress saturated to dry and bulk gravity and dielectric constant .when moisture damage occur, air void percentage goes up and dielectric constant decrease.